Question

Iron contract on heating and expand on cooling

Answer 1

Some metals expand more than others due to differences in the forces between the atoms / molecules. In metals such as iron the forces between the atoms are stronger so it is more difficult for the atoms to move around . ..When the strip is heated the brass expands more than the iron so the strip beds.

Answer 2

Answer:

yes  iron contacts on heating and expand on cooling

Explanation:

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